iledcom/PHP message handler: sendmail.php

## PHP message handler: sendmail.php
file: sendmail.php
<?php
session_start();
if (isset($_POST["send"])) {
	$from = $_POST["from"];
	$to = $_POST["to"];
	$subject = $_POST["subject"];
	$message = $_POST["message"];
	$_SESSION["from"] = $from;
	$_SESSION["to"] = $to;
	$_SESSION["subject"] = $subject;
	$_SESSION["message"] = $message;
	$error_from = "";
	$error_to = "";
	$error_subject = "";
	$error_message = "";
	$error = false;
	if (!preg_match("/^[a-z0-9][a-z0-9\.-_]*[a-z0-9]*@([a-z0-9]+([a-z0-9-]*[a-z0-9]+)*\.)+[a-z]+/i", $from)) {
		$error_from = "Некорректный e-mail";
		$error = true;
	}
	if (!preg_match("/^[a-z0-9][a-z0-9\.-_]*[a-z0-9]*@([a-z0-9]+([a-z0-9-]*[a-z0-9]+)*\.)+[a-z]+/i", $to)) {
		$error_to = "Некорректный e-mail";
		$error = true;
	}
	if (strlen($subject) == 0) {
		$error_subject = "Не написана тема";
		$error = true;
	}
	if (strlen($message) == 0) {
		$error_message = "Не написано сообщение";
		$error = true;
	}
	if (!$error) {
		$subject = "==?utf8?B?".base64_encode($subject)."?=";
		$headers = "From: $from\r\nReply-to: $from\r\nContent-type: text/plain; charset = utf-8\r\n";
		mail ($to, $subject, $message, $headers);
		header("Location: success.php?send=1");
		exit;

	}
}

 ?>
 <html>
 	<head>
 		<title>Сервис рассылки</title>
 		<meta charset="utf-8">
	</head>
	<body>
		<h1>Отправьте почту</h1>
		<form name="myform" action="sendmail.php" method="post">
			<table>
				<tr>
					<td>От кого:</td>
					<td>
						<input type="text" name="from" value="<?php echo $_SESSION["from"];?>">
					</td>
					<td>
						<span style="color: red;"><?php echo $error_from;?></span>
					</td>
				</tr>
				<tr>
					<td>Кому:</td>
					<td>
						<input type="text" name="to" value="<?php echo $_SESSION["to"];?>">
					</td>
					<td>
						<span style="color: red;"><?php echo $error_to;?></span>
					</td>
				</tr>
				<tr>
					<td>Тема:</td>
					<td>
						<input type="text" name="subject" value="<?php echo $_SESSION["subject"];?>">
					</td>
					<td>
						<span style="color: red;"><?php echo $error_subject;?></span>
					</td>
				</tr>
				<tr>
					<td>Сообщение:</td>
					<td>
						<textarea name="message" cols="15" rows="10"><?php echo $_SESSION["message"];?></textarea>
					</td>
					<td>
						<span style="color: red;"><?php echo $error_message;?></span>
					</td>
				</tr>
				<tr>
					<td colspan="3">
						<input type="submit" name="send" value="Отправить">
					</td>
				</tr>
			</table>
		</form>
	</body>
 </html>

 file: success.php

 <?php
session_start();
if ($_GET["send"] == 1) {
	echo "Ваше сообщение успешно отправлено на ".$_SESSION["to"];
	echo "<br><a href='sendmail.php'>Вернуться</a>";
}
?>
 <html>
 	<head>
 		<title>Результат рассылки</title>
 		<meta charset="utf-8">
	</head>
	<body>
	</body>
 </html>
	file: sendmail.php
	<?php
	session_start();
	if (isset($_POST["send"])) {
	$from = $_POST["from"];
	$to = $_POST["to"];
	$subject = $_POST["subject"];
	$message = $_POST["message"];
	$_SESSION["from"] = $from;
	$_SESSION["to"] = $to;
	$_SESSION["subject"] = $subject;
	$_SESSION["message"] = $message;
	$error_from = "";
	$error_to = "";
	$error_subject = "";
	$error_message = "";
	$error = false;
	if (!preg_match("/^[a-z0-9][a-z0-9\.-_][a-z0-9]@([a-z0-9]+([a-z0-9-][a-z0-9]+)\.)+[a-z]+/i", $from)) {
	$error_from = "Некорректный e-mail";
	$error = true;
	}
	if (!preg_match("/^[a-z0-9][a-z0-9\.-_][a-z0-9]@([a-z0-9]+([a-z0-9-][a-z0-9]+)\.)+[a-z]+/i", $to)) {
	$error_to = "Некорректный e-mail";
	$error = true;
	}
	if (strlen($subject) == 0) {
	$error_subject = "Не написана тема";
	$error = true;
	}
	if (strlen($message) == 0) {
	$error_message = "Не написано сообщение";
	$error = true;
	}
	if (!$error) {
	$subject = "==?utf8?B?".base64_encode($subject)."?=";
	$headers = "From: $from\r\nReply-to: $from\r\nContent-type: text/plain; charset = utf-8\r\n";
	mail ($to, $subject, $message, $headers);
	header("Location: success.php?send=1");
	exit;

	}
	}

	?>
	<html>
	<head>
	<title>Сервис рассылки</title>
	<meta charset="utf-8">
	</head>
	<body>
	<h1>Отправьте почту</h1>
	<form name="myform" action="sendmail.php" method="post">
	<table>
	<tr>
	<td>От кого:</td>
	<td>
	<input type="text" name="from" value="<?php echo $_SESSION["from"];?>">
	</td>
	<td>
	<span style="color: red;"><?php echo $error_from;?></span>
	</td>
	</tr>
	<tr>
	<td>Кому:</td>
	<td>
	<input type="text" name="to" value="<?php echo $_SESSION["to"];?>">
	</td>
	<td>
	<span style="color: red;"><?php echo $error_to;?></span>
	</td>
	</tr>
	<tr>
	<td>Тема:</td>
	<td>
	<input type="text" name="subject" value="<?php echo $_SESSION["subject"];?>">
	</td>
	<td>
	<span style="color: red;"><?php echo $error_subject;?></span>
	</td>
	</tr>
	<tr>
	<td>Сообщение:</td>
	<td>
	<textarea name="message" cols="15" rows="10"><?php echo $_SESSION["message"];?></textarea>
	</td>
	<td>
	<span style="color: red;"><?php echo $error_message;?></span>
	</td>
	</tr>
	<tr>
	<td colspan="3">
	<input type="submit" name="send" value="Отправить">
	</td>
	</tr>
	</table>
	</form>
	</body>
	</html>

	file: success.php

	<?php
	session_start();
	if ($_GET["send"] == 1) {
	echo "Ваше сообщение успешно отправлено на ".$_SESSION["to"];
	echo "<br><a href='sendmail.php'>Вернуться</a>";
	}
	?>
	<html>
	<head>
	<title>Результат рассылки</title>
	<meta charset="utf-8">
	</head>
	<body>
	</body>
	</html>